<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-model</title>
</head>

<body>
    <div id="app">
        <h3>小羊的礼物清单</h3>
        <table>
            <tr>
                <td>名字</td>
                <td>数量</td>
            </tr>
            <tr v-for="(item,index) in list" :key=""item.id>
                <td>{{item.name}}</td>
                <td>{{item.num}}</td>
            </tr>
        </table>
        <p>礼物总数:  {{totalCount}}个</p>
    </div>

    <!-- 引入包-->
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                list:[
                    {id:1,name:'篮球',num:1},
                    {id:2,name:'玩具',num:2},
                    {id:3,name:'铅笔',num:5}
                ]
            },
            computed:{
                totalCount(){
                    let total=this.list.reduce((sum,item)=>sum+item.num,0);
                    return total;
                }
            }
        })
    </script>
</body>

</html>